Link to home
Start Free TrialLog in
Avatar of Combemartin
Combemartin

asked on

Emails bouncing back asking for domain name

Out of the blue this morning, a number of users are having bounce back with this message from proofpoint, never seen this one before (pic attached):

The reverse hostname of this IP appears to come from a DHCP block. If this is actually a static IP with an email server, change the host name (or have your ISP change it) to something identifiable. For example: mail.domainname.com

Where do I go to change it ?? Thanks
proofpoint.jpg
Avatar of Member_2_6582184
Member_2_6582184
Flag of Germany image

do an nslookup of the IP.
Please ask your ISP - they probably changed something in DNS or proofprint chained ther spam policy. Most commonly you can set a reverse name for static IPs in the Web admin center of your ISP. If it was never set, do as the massage says!
SOLUTION
Avatar of Kimputer
Kimputer

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
ASKER CERTIFIED SOLUTION
Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of Combemartin
Combemartin

ASKER

Thanks Simon & Kim, it is a business line but we are also going Fibra later next week but will keep the current BB as a backup, so I best wait until the new Business Infinity2 to do this in one swoop.
Thanks guys.